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#pragma once
#include <cstddef>
#include <cstdint>
#include <utility>
#include <mutex>
#include <string_view>
#include <vector>
#include <base/defines.h>
#include <base/types.h>
/** Allows to count number of simultaneously happening error codes.
* See also Exception.cpp for incrementing part.
*/
namespace DB
{
namespace ErrorCodes
{
/// ErrorCode identifier (index in array).
using ErrorCode = int;
using Value = size_t;
using FramePointers = std::vector<void *>;
/// Get name of error_code by identifier.
/// Returns statically allocated string.
std::string_view getName(ErrorCode error_code);
/// Get error code value by name.
///
/// It has O(N) complexity, but this is not major, since it is used only
/// for test hints, and it does not worth to keep another structure for
/// this.
ErrorCode getErrorCodeByName(std::string_view error_name);
struct Error
{
/// Number of times Exception with this ErrorCode had been throw.
Value count = 0;
/// Time of the last error.
UInt64 error_time_ms = 0;
/// Message for the last error.
std::string message;
/// Stacktrace for the last error.
FramePointers trace;
};
struct ErrorPair
{
Error local;
Error remote;
};
/// Thread-safe
struct ErrorPairHolder
{
public:
ErrorPair get();
void increment(bool remote, const std::string & message, const FramePointers & trace);
private:
ErrorPair value TSA_GUARDED_BY(mutex);
std::mutex mutex;
};
/// ErrorCode identifier -> current value of error_code.
extern ErrorPairHolder values[];
/// Get index just after last error_code identifier.
ErrorCode end();
/// Add value for specified error_code.
void increment(ErrorCode error_code, bool remote, const std::string & message, const FramePointers & trace);
}
}
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